Display substrate and method of manufacturing the same and electronic device

Abstract

A display substrate and a method of manufacturing the same and an electronic device. The display substrate is defined to be an array area and a peripheral area surrounding the array area. The array area includes a plurality of light emitting subunits. Each of the plurality of light emitting subunits includes: a first electrode, a second electrode and a light emitting layer. The first electrodes of the plurality of light emitting subunits are electrically connected with each other. The display substrate further includes a light extraction layer. Projections of the first electrodes of the plurality of light emitting subunits and a projection of the connecting electrode on the base substrate are within a projection of the light extraction layer on the base substrate.

What is claimed is: 
     
       1. A display substrate, wherein the display substrate is defined to be an array area and a peripheral area surrounding the array area;
 the display substrate comprises a base substrate; 
 the array area comprises a plurality of light emitting subunits; each of the plurality of light emitting subunits comprises: a first electrode, a second electrode and a light emitting layer which are laminated on a surface of the base substrate; the light emitting layer is between the first electrode and the second electrode; the first electrode is farther away from the base substrate than the light emitting layer; the first electrodes of the plurality of light emitting subunits are electrically connected with each other; 
 the peripheral area comprises a connecting electrode and a dummy electrode including a first dummy electrode and a second dummy electrode, the connecting electrode is on the surface of the base substrate and at least partially surrounds the array area; the connecting electrode is electrically connected with the first electrodes of the plurality of light emitting subunits; 
 the display substrate further comprises a light extraction layer on a side of the first electrode and the connecting electrode away from the base substrate; and projections of the first electrodes of the plurality of light emitting subunits and a projection of the connecting electrode on the base substrate are within a projection of the light extraction layer on the base substrate in at least one direction parallel to the surface; and 
 a pixel definition layer completely covers a surface of the second dummy electrode away from the base substrate; 
 wherein the second dummy electrode comprises two ring-shaped sub-electrodes, and the pixel definition layer is disposed between the two ring-shaped sub-electrodes of the second dummy electrode, and the pixel definition layer also covers a side surface of the second dummy electrode. 
 
     
     
       2. The display substrate according to  claim 1 , wherein
 the connecting electrode comprises a first conductive sublayer and a second conductive sublayer, the second conductive sublayer is on a side of the first conductive sublayer away from the base substrate, the second conductive sublayer is at least partially overlapped with the first conductive sublayer in a direction perpendicular to the surface of the base substrate, and the second conductive sublayer is electrically connected to the first conductive sublayer and the first electrode; and 
 the light extraction layer covers an upper surface of the connecting electrode and the dummy electrode away from the base substrate, and a whole side surface of each of the first conductive sublayer and the second conductive sublayer away from the display area; 
 the first conductive sublayer is in direct contact with the second conductive sublayer, 
 the first conductive sublayer and the second electrode are in a same conductive layer, comprise a same material, and are insulated from each other, and 
 the second conductive sublayer and the first electrode are in a same conductive layer and comprise a same material. 
 
     
     
       3. The display substrate according to  claim 2 , wherein
 the first electrodes of the plurality of light emitting subunits are integrally connected and serve as at least a part of a first common electrode layer; 
 the second conductive sublayer and the first common electrode layer are integrally connected; 
 each of the second conductive sublayer and the first electrode comprises a first sublayer and a second sublayer which are laminated; 
 the first sublayer comprises aluminum magnesium alloy; 
 the second sublayer comprises indium zinc oxide; and 
 the second sublayer is on a side of the first sublayer away from the base substrate. 
 
     
     
       4. The display substrate according to  claim 1 , wherein
 the first dummy electrode is on the surface of the base substrate and at least partially surrounds the connecting electrode; and 
 the connecting electrode is between the first dummy electrode and the array area. 
 
     
     
       5. The display substrate according to  claim 4 , wherein a projection of the light extraction layer on the base substrate is at least partially overlapped with a projection of the first dummy electrode on the base substrate. 
     
     
       6. The display substrate according to  claim 1 , wherein the display substrate further comprises a first insulating layer and an intermediate conductive layer,
 the first insulating layer is on a side of the second electrode away from the first electrode and comprises a first via hole and a second via hole; 
 the intermediate conductive layer is on a side of the first insulating layer away from the second electrode and comprises a first conductive part and a second conductive part; and 
 the second electrode is electrically connected with the first conductive part through the first via hole; and the first electrode is electrically connected with the second conductive part through the connecting electrode and the second via hole. 
 
     
     
       7. The display substrate according to  claim 6 , wherein
 the base substrate comprises a first circuit and a second circuit; 
 the display substrate further comprises a second insulating layer on a side of the intermediate conductive layer away from the second electrode; 
 the second insulating layer is between the intermediate conductive layer and the base substrate; 
 the second insulating layer comprises a third via hole and a fourth via hole; 
 the second electrode is electrically connected with the first circuit of the base substrate through the first via hole, the first conductive part and the third via hole; and the first electrode is electrically connected with the second circuit of the base substrate through the connecting electrode, the second via hole, the second conductive part and the fourth via hole, and 
 the first via hole, the second via hole, the third via hole and the fourth via hole are filled with a conductive material. 
 
     
     
       8. The display substrate according to  claim 2 , wherein the second dummy electrode is on the surface of the base substrate and at least partially surrounds the array area; and the second dummy electrode is between the connecting electrode and the array area,
 the first electrode and the light emitting layer of the light emitting subunit adjacent to the second dummy electrode extend to be at least partially overlapped with the second dummy electrode in the direction perpendicular to the surface of the base substrate; 
 the second conductive sublayer extend to be at least partially overlapped with the second dummy electrode in the direction perpendicular to the surface of the base substrate; and 
 the first dummy electrode and the second dummy electrode are arranged on two sides of the connecting electrode, respectively. 
 
     
     
       9. The display substrate according to  claim 8 , wherein the peripheral area further comprises a sensor electrode;
 the sensor electrode is between the second dummy electrode and the array area on the surface of the base substrate; 
 the first electrode and the light emitting layer of the light emitting subunit adjacent to the second dummy electrode extend to completely cover the sensor electrode in the direction perpendicular to the surface of the base substrate; 
 the base substrate comprises a third circuit; 
 the intermediate conductive layer further comprises a third conductive part; the first insulating layer further comprises a fifth via hole; the second insulating layer further comprises a sixth via hole; 
 the sensor electrode is electrically connected with the third conductive part through the fourth via hole, and is electrically connected with the third circuit of the base substrate through the fourth via hole, the third conducive part and the fifth via hole; and 
 the fifth via hole and the sixth via hole are filled with a conductive material. 
 
     
     
       10. The display substrate according to  claim 9 , wherein the peripheral area further comprises a third dummy electrode;
 the third dummy electrode is on the surface of the base substrate and at least partially surrounds the array area; and the third dummy electrode is between the sensor electrode and the array area, and 
 the first electrode and the light emitting layer of the light emitting subunit adjacent to the second dummy electrode extend to completely cover the third dummy electrode in the direction perpendicular to the surface of the base substrate. 
 
     
     
       11. The display substrate according to  claim 10 , wherein the pixel definition layer is at at least one of following positions:
 between the second electrodes of adjacent light emitting subunits; 
 between the connecting electrode and the first dummy electrode; 
 between the connecting electrode and the second dummy electrode; 
 between the second dummy electrode and the sensor electrode; 
 between the sensor electrode and the third dummy electrode; 
 between the third dummy electrode and the second electrode of the light emitting subunit adjacent to the third dummy electrode; and 
 between the second dummy electrode and the light emitting layer of the light emitting subunit adjacent to the second dummy electrode. 
 
     
     
       12. The display substrate according to  claim 10 , wherein the first conductive sublayer of the connecting electrode, the first dummy electrode, the second dummy electrode, the sensor electrode, the third dummy electrode, and the second electrode of the light emitting subunit are in a same conductive layer, and
 the first dummy electrode, the second dummy electrode and the third dummy electrode are in a floating state. 
 
     
     
       13. The display substrate according to  claim 10 , wherein the display substrate further comprises a first encapsulation layer on a side of the light extraction layer away from the base substrate. 
     
     
       14. The display substrate according to  claim 13 , wherein the display substrate further comprises a color filter layer,
 the color filter layer is on a side of the first encapsulation layer away from the base substrate; 
 the color filter layer comprises: a first color filter part; 
 the first color filter part is in the array area and is overlapped with at least one light emitting subunit in the direction perpendicular to the surface of the base substrate; 
 the color filter layer further comprises: a second color filter part; and 
 the second color filter part is in the peripheral area and is overlapped with at least one of following elements in the direction perpendicular to the surface of the base substrate: 
 the connecting electrode; 
 the first dummy electrode; 
 the second dummy electrode; 
 the sensor electrode; and 
 the third dummy electrode. 
 
     
     
       15. The display substrate according to  claim 14 , wherein the display substrate further comprises a second encapsulation layer,
 the second encapsulation layer is on a side of the color filter layer away from the base substrate, 
 a projection of the first encapsulation layer on the base substrate is within a projection of the second encapsulation layer on the base substrate, and 
 an area of the projection of the first encapsulation layer on the base substrate is less than an area of the projection of the second encapsulation layer on the base substrate. 
 
     
     
       16. The display substrate according to  claim 15 , further comprising a cover plate,
 wherein the cover plate is on a side of the second encapsulation layer of the display substrate away from the base substrate, 
 the projection of the second encapsulation layer on the base substrate is within a projection of the cover plate on the base substrate, and 
 the area of the projection of the second encapsulation layer on the base substrate is less than an area of the projection of the cover plate on the base substrate. 
 
     
     
       17. The display substrate according to  claim 1 , wherein the second electrode is a reflecting electrode, and
 the base substrate is a silicon-base substrate; and the silicon-base substrate comprises a driving circuit configured to drive the plurality of light emitting subunits. 
 
     
     
       18. An electronic device, comprising a display substrate, wherein the display substrate is defined to be an array area and a peripheral area surrounding the array area;
 the display substrate comprises a base substrate; 
 the array area comprises a plurality of light emitting subunits; each of the plurality of light emitting subunits comprises: a first electrode, a second electrode and a light emitting layer which are laminated on a surface of the base substrate; the light emitting layer is between the first electrode and the second electrode; the first electrode is farther away from the base substrate than the light emitting layer; the first electrodes of the plurality of light emitting subunits are electrically connected with each other; 
 the peripheral area comprises a connecting electrode and a dummy electrode including a first dummy electrode and a second dummy electrode, the connecting electrode is on the surface of the base substrate and at least partially surrounds the array area; the connecting electrode is electrically connected with the first electrodes of the plurality of light emitting subunits; and 
 the display substrate further comprises a light extraction layer on a side of the first electrode and the connecting electrode away from the base substrate; and projections of the first electrodes of the plurality of light emitting subunits and a projection of the connecting electrode on the base substrate are within a projection of the light extraction layer on the base substrate in at least one direction parallel to the surface; and 
 a pixel definition layer completely covers a surface of the second dummy electrode away from the base substrate; 
 wherein the second dummy electrode comprises two ring-shaped sub-electrodes, and the pixel definition layer is disposed between the two ring-shaped sub-electrodes of the second dummy electrode, and the pixel definition layer also covers a side surface of the second dummy electrode. 
 
     
     
       19. A method of manufacturing a display substrate, wherein the display substrate is defined to be an array area and a peripheral area surrounding the array area; the display substrate comprises a base substrate; and the method comprises:
 disposing a plurality of light emitting subunits in the array area on a surface of the base substrate, wherein each of the plurality of light emitting subunits comprises: a first electrode, a second electrode and a light emitting layer which are laminated on the surface of the base substrate; the light emitting layer is between the first electrode and the second electrode; the first electrode is farther away from the base substrate than the light emitting layer; the first electrodes of the plurality of light emitting subunits are electrically connected with each other; 
 disposing a connecting electrode and a dummy electrode including a first dummy electrode and a second dummy electrode in the peripheral area on the surface of the base substrate surrounding the array area, the connecting electrode being electrically connected with the first electrode; and 
 disposing a light extraction layer on a side of the first electrode and the connecting electrode away from the base substrate, so that projections of the first electrode and the connecting electrode on the base substrate are within a projection of the light extraction layer on the base substrate in at least one direction parallel to the surface; and 
 disposing a pixel definition layer completely covering a surface of the second dummy electrode away from the base substrate; 
 wherein the second dummy electrode comprises two ring-shaped sub-electrodes, and the pixel definition layer is disposed between the two ring-shaped sub-electrodes of the second dummy electrode, and the pixel definition layer also covers a side surface of the second dummy electrode.